# Crypto Fear & Greed Index

> Crypto Fear & Greed Index is a paid API for AI agents from api.web3identity.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Returns the current Crypto Fear & Greed Index value, classification, and timestamp as a market sentiment indicator

## Facts

- Endpoint: GET https://api.web3identity.com/api/market/fear-greed
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-web3identity-com-77ea496b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6WCHJTnE_Y3n5zNqcwyHb

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability api-web3identity-com-77ea496b
```

Example prompt: What is the current Crypto Fear & Greed Index — give me the numeric score and whether the market is in fear, greed, or somewhere in between?

## When to prefer this

Use this endpoint when you need a quick, single-value sentiment snapshot of the overall crypto market. Ideal for trading bots, market dashboards, or any agent that needs to make decisions conditioned on current market mood without requiring historical series or detailed breakdown.

## Known failure modes

- API unavailable or rate-limited returning 402/503
- Stale or delayed data if upstream sentiment feed is lagging
- Empty or malformed JSON response if data pipeline fails
- Payment required error if x402 payment not provided

## How this service works

Crypto Fear & Greed Index - market sentiment indicator

## Output

Returns a JSON object with a numeric index value (0–100), a sentiment classification string (e.g. 'Extreme Fear', 'Fear', 'Neutral', 'Greed', 'Extreme Greed'), and a timestamp indicating when the reading was taken.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {}
 }
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "value": {
       "type": "number"
      },
      "timestamp": {
       "type": "string"
      },
      "classification": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-web3identity-com-77ea496b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.web3identity.com](https://www.zero.xyz/host/api.web3identity.com/llms.txt)